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Date:      Sun, 14 May 2000 21:22:03 +0200
From:      Poul-Henning Kamp <phk@critter.freebsd.dk>
To:        Matthew Dillon <dillon@apollo.backplane.com>
Cc:        freebsd-hackers@freefall.freebsd.org
Subject:   Re: PR kern/18346 - struct file ref count is a short, can be overflowed 
Message-ID:  <1175.958332123@critter.freebsd.dk>
In-Reply-To: Your message of "Sun, 14 May 2000 12:12:33 PDT." <200005141912.MAA07098@apollo.backplane.com> 

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In message <200005141912.MAA07098@apollo.backplane.com>, Matthew Dillon writes:
>    PR kern/18346
>
>    I would like to bump struct file f_count and f_msgcount from
>    a short to an int, in both 5.x and 4.x, because the program
>    supplied with the PR can demonstratably crash the machine from
>    userland and cause other serious problems, such as file descriptor
>    stealing (what happens when you roll the ref count to 0?).  Any 
>    objections?

Agreed.

--
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD coreteam member | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.


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